EP2337710B1 - Générateur de gaz pour un module de coussin gonflable - Google Patents

Générateur de gaz pour un module de coussin gonflable Download PDF

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Publication number
EP2337710B1
EP2337710B1 EP09744985A EP09744985A EP2337710B1 EP 2337710 B1 EP2337710 B1 EP 2337710B1 EP 09744985 A EP09744985 A EP 09744985A EP 09744985 A EP09744985 A EP 09744985A EP 2337710 B1 EP2337710 B1 EP 2337710B1
Authority
EP
European Patent Office
Prior art keywords
gas generator
housing
filter
throttle
extension direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09744985A
Other languages
German (de)
English (en)
Other versions
EP2337710A1 (fr
Inventor
Heiko Kratz
Björn WINDHAUSEN
Michael Menzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata AG
Original Assignee
Takata AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takata AG filed Critical Takata AG
Publication of EP2337710A1 publication Critical patent/EP2337710A1/fr
Application granted granted Critical
Publication of EP2337710B1 publication Critical patent/EP2337710B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
    • B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26011—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a filter through which the inflation gas passes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the invention relates to a gas generator according to the preamble of claim 1 and to a method for producing a gas generator.
  • Such a gas generator comprises a housing for supporting the components of the gas generator, in particular a fuel for generating a gas with which a gas bag of a motor vehicle airbag module can be inflated, and a filter mounted in the housing for filtering the gas generator can be generated with the gas, wherein said filter for Cooling of the said gas and / or for the retention (filtering) of pollutants may be formed, resulting from the combustion of said fuel.
  • the document DE 198 02 355 A1 shows a generic type gas generator with the features of the preamble of claim 1.
  • the invention is based on the problem to provide a simple and inexpensive to manufacture gas generator and a corresponding method for producing such a gas generator.
  • That part of the gas generator arranged in the housing is pressed into that recess, so that the filter is widened in cross-section and is therefore pressed against the housing by an interior of the housing defined by the housing. This will set the filter in the enclosure.
  • the gas generator can be sealed with advantage by means of an O-ring, since no damage to the interior of the housing facing the inside of the housing takes place, such as when crimping a filter with the housing.
  • the filter circumscribes the said part of the gas generator closed annular.
  • that part of the gas generator is preferably designed as a bolt, which protrudes in particular from a throttle arranged in the housing of the gas generator.
  • the bolt is integrally formed on the throttle, so that the bolt and the throttle form a unitary component.
  • Such a throttle is arranged in particular - from the interior of the housing - in front of an outflow opening of the gas generator and is preferably used for throttling the gas flow generated by the gas generator, and optionally for directing and / or distributing the generated gas.
  • the housing is designed to extend in particular along a direction of extent, wherein the bolt preferably protrudes from the throttle along the extension direction.
  • the gas generator is a so-called tubular gas generator, that is, the housing of the gas generator is at least partially, preferably over the entire length along the extension direction, formed as a hollow cylinder with a coincident with the extension direction cylinder axis.
  • the recess of the filter in which the part of the gas generator (bolt) is inserted or pressed, formed as a through hole, which is in particular aligned with the extension direction, ie, the through hole has the shape of a cylindrical recess whose cylinder axis with the cylinder axis of the housing coincides.
  • the filter is formed at least in sections, preferably over its entire length along the extension direction, as a hollow cylinder. It points that hollow cylindrical section or the filter on a cylinder axis, which coincides with the cylinder axis of the housing.
  • the filter surrounds only the bolt in a plane extending transversely to the direction of extension, that is, in a closed annular manner, preferably over the entire length of the bolt along the extension direction of the bolt.
  • the filter surrounds both the bolt and the throttle connected thereto in a plane extending transversely to the extension direction, preferably over an entire length of the unit bolt / throttle along said extension direction.
  • the problem according to the invention is solved by a method for producing a gas generator.
  • the said part of the gas generator for fixing the filter to the housing when inserting the filter in the housing along a direction of extension of the housing is inserted (pressed) in that recess so that the filter widens transversely to the direction of extension (widened) and therefore against a Filter facing the inside of the housing presses, which extends along the direction of extension and the filter rotates transversely to the direction of extension.
  • a seal is arranged in the housing before arranging the filter in the housing, so that that seal comes to lie on an edge of the housing limiting an outflow opening of the gas generator.
  • the seal is it is in particular a closed annular seal (so-called O-ring).
  • O-ring closed annular seal
  • gas generated by the gas generator can flow out of the housing of the gas generator into an outer space surrounding the gas generator.
  • the said outflow opening can also form a flow channel which distributes the gas to a plurality of openings (communicating with the exterior) of the housing of the gas generator.
  • a throttle is further introduced into the housing of the gas generator that that throttle comes to lie with the interposition of the seal on said edge region of the discharge opening, wherein the throttle is preferably arranged in the housing such that the part in the form of a extending along the extension direction Bolzens protrudes from the throttle.
  • FIG. 1 shows a schematic sectional view along a direction of extension E extended gas generator 1 in the form of a tubular gas generator.
  • the gas generator 1 serves to generate a gas with which, in the event of a crash, an airbag of an airbag module in or on a motor vehicle can be inflated to protect a person.
  • the gas generator 1 has a housing 2 for supporting the components of the gas generator 1.
  • the housing 2 is hollow-cylindrical in shape and defines an interior I of the gas generator 1.
  • the cylinder axis 20 of the housing 2 is oriented along the extension direction E.
  • the housing 2 has an interior 2 a facing the interior I, which rotates closed in a plane perpendicular to the cylinder axis 20.
  • an outflow opening 7 is provided, through which gas generated in the interior I of the housing 2 can flow into an outer space surrounding the housing 2.
  • outflow opening 7 communicates with a plurality of openings 151 of a diffuser 15 of the housing 2, which is provided on the end face 2b of the gas generator 1. Gas escaping from the gas generator 1 (housing 2) flows through these openings 151 out of the outflow opening 7, wherein those openings 151 are arranged so that the gas flows out of the housing 2 of the gas generator 1 as impulse-neutrally as possible.
  • the openings 151 can be suitably arranged with respect to the airbag.
  • the openings 151 and the diffuser 15 are arranged in an interior of a gas bag to be inflated.
  • the outflow opening 7 is delimited by an edge region 8, which extends in a direction perpendicular to the extension direction E extending plane and annularly along that plane.
  • a seal 6 which can be prestressed elastically along the extension direction E is provided, with a through opening which is congruent with the outflow opening 7 of the housing 2.
  • the seal 6 lies flat on the said edge region 8.
  • the gas generator 1 further comprises a throttle 5 with a wall 56 which extends transversely to the extension direction E and is arranged at a distance from the inside 2a of the housing 2 (in a direction perpendicular to the direction of extension E plane).
  • the said wall 56 has a seal 6 facing peripheral edge region 55, via which the throttle 5 rests on the edge region 8 of the housing 2, with the interposition of the seal. 6
  • the throttle 5 has a plurality of throttle openings 51 which are formed on the said wall 56. There is a flow connection between the throttle openings 51 and the outflow opening 7, so that gas generated in the interior I of the housing 2 passes through the throttle openings 51 via the Outflow opening 7 and the openings 151 of the diffuser 15 can enter the outside space.
  • a filter 3 is provided. This is formed as a hollow cylinder and has a along the extension direction E or along the cylinder axis 22 extending recess in the form of a cylindrical passage opening 30, the cylinder axis coincides with the cylinder axis 20 of the housing 2.
  • the filter 3 further has an outer side 32, which faces the inner side 2 a of the housing 2.
  • the filter 3 is now arranged in the interior I of the gas generator 1, that a projecting from the throttle 5 in the direction of the filter 3 part 4 in the form of a bolt, which may be integrally formed on the throttle 5, along the extension direction E or the cylinder axis 20 is inserted into the recess 30 of the filter 3, wherein said bolt 4, the filter 3 - whose outer side 32 is not inserted in the bolt 4 with clearance to the inside 2a in the interior I - widens transversely to the extension direction E, so that the filter 3 is pressed with its outer side 32 by the bolt 4 against the inner side 2a of the housing 2.
  • one of the inside 2a of the housing 2 facing the outside 53 of the bolt 4 is close to a recess 30 bounding the inside 32 of the filter 3.
  • the filter 3 is fixed in the housing 2.
  • the fuel 9 of the gas generator 1 is arranged in the interior I of the housing 2 with respect to the direction of extension E between the filter 3 and a damping disk 10, which biases the fuel 9 against the filter 3 or by the fuel 9 unoccupied volume of the interior I of Housing 2 fills.
  • the fuel 9 is ignited by means of a fuze 13, which can be activated by means of a suitable on-board electronics.
  • the igniter 13 engages with a free end region 13 a through opening 10 a of the damping disk 10, so that the fuel 9 rests against that free end region 13 a of the igniter 13.
  • the igniter 13 is held by a holding member 11 that is crimped with a free end portion 2b of the housing 2, which is opposite to the diffuser 15 along the extension direction E.
  • a sealing element 12 is provided, which is arranged in a circumferential groove 11a on the retaining element 11 and is biased against the inner side 2a of the housing 2 and against the retaining element 11.
  • the igniter 13 further comprises electrical contacts 13b for activating the igniter 13, which are led out of the interior I of the housing 2 through a passage opening 11b of the holding element 11.
  • electrical contacts 13b for activating the igniter 13, which are led out of the interior I of the housing 2 through a passage opening 11b of the holding element 11.
  • a sealing means 14 is provided, that sits in a corresponding recess of the holding element 11.
  • the filter 3 is pressed only with the bolt 4. That is, only the said pin 4 is arranged in the recess 30 of the filter 3, the throttle 5 is together with the wall 56 along the extension direction E from the filter 3 from and in the direction of the diffuser 15 and the discharge opening. 7
  • the seal 6 is first inserted into the housing 2, so that it comes to rest on the edge region 8 of the housing 2. Then, the throttle 5 together with bolts 4 is inserted into the housing 2, so that the throttle 5 is supported over the edge region 55 of its wall 56 on the seal 6. Thereafter, the filter 3 as described above on the bolt 4 and the pin 4 and the throttle 5 is pressed, wherein the seal 6 is biased against the edge region 8 of the housing 2 and the edge portion 55 of the wall 56 and the filter 3 with the housing 2 is jammed.
  • a seal 6 is arranged in the housing 2 before the filter 3 is arranged in the housing 2, so that that seal 6 rests on an edge region 8 of the housing 2 delimiting an outflow opening 7 of the gas generator 1.
  • the method may be characterized by arranging a throttle 5 in the housing 2, so that the throttle 5 rests with the interposition of the seal 6 at the said edge region 8.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un générateur de gaz (1) pour un module de coussin gonflable, qui comporte un boîtier (2) et un filtre (3) fixé dans le boîtier (2) et destiné à filtrer un gaz pouvant être produit par le générateur de gaz (1). Selon l'invention, pour fixer le filtre (3) dans le boîtier (2), une partie (4) du générateur de gaz (1) est introduite dans un évidement (30) ménagé dans le filtre (3).

Claims (15)

  1. Générateur de gaz comprenant :
    - un boîtier (2), et
    - un filtre (3) fixé dans le boîtier (2) pour la filtration de gaz pouvant être générés avec le générateur de gaz (1), dans lequel
    - pour la fixation du filtre (3) dans le boîtier (2), une partie (4) du générateur de gaz (1) est introduite dans un évidement (30) du filtre (3) ;
    caractérisé en ce
    que la partie (4) est aménagée et prévue pour élargir le filtre (3) de sorte que le filtre (3) appuie contre le boîtier (2) pour la fixation du filtre (3) dans le boîtier (2), ladite partie (4) du générateur de gaz (1) étant réalisée sous la forme d'un axe.
  2. Générateur de gaz selon la revendication 1, caractérisé en ce que le filtre (3) vient en prise autour de la partie (4) du générateur de gaz (1).
  3. Générateur de gaz selon l'une quelconque des revendications précédentes, caractérisé en ce que l'axe (4) s'étend depuis un papillon (5) disposé dans le boîtier (1) du générateur de gaz (1).
  4. Générateur de gaz selon la revendication 3, caractérisé en ce que l'axe (4) est formé d'un seul tenant sur le papillon (5).
  5. Générateur de gaz selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier (2) s'étend le long d'une direction d'extension (E).
  6. Générateur de gaz selon les revendications 3 et 5, caractérisé en ce que l'axe (4) s'étend depuis papillon (5) le long de la direction d'extension (E).
  7. Générateur de gaz selon la revendication 5 ou 6, caractérisé en ce que le boîtier (2) est réalisé au moins par portions sous la forme d'un cylindre creux avec un axe de cylindre (20) coïncidant avec la direction d'extension (E).
  8. Générateur de gaz selon l'une quelconque des revendications précédentes, caractérisé en ce que l'évidement (30) est réalisé sous la forme d'une ouverture de passage.
  9. Générateur de gaz selon les revendications 5 et 8, caractérisé en ce que l'ouverture de passage (30) est alignée avec la direction d'extension (E).
  10. Générateur de gaz selon l'une quelconque des revendications précédentes, caractérisé en ce que le filtre (3) est réalisé au moins par portions sous la forme d'un cylindre creux.
  11. Générateur de gaz selon les revendications 7 et 10, caractérisé en ce que le cylindre creux du filtre (3) présente un axe de cylindre (20) qui coïncide avec l'axe de cylindre (20) du boîtier (2).
  12. Générateur de gaz selon la revendication 5 ou l'une quelconque des revendications 6 à 11, dans la mesure où elle dépend de la revendication 5, caractérisé en ce que le filtre (3) entoure l'axe (4) dans un plan s'étendant transversalement à la direction d'extension (E).
  13. Générateur de gaz selon la revendication 3 et selon la revendication 5 ou l'une quelconque des revendications 6 à 12, dans la mesure où elle dépend de la revendication 5, caractérisé en ce que le filtre (3) entoure l'axe (4) et le papillon (5) relié à celui-ci dans un plan s'étendant transversalement à la direction d'extension (E).
  14. Procédé de fabrication d'un générateur de gaz en particulier selon l'une quelconque des revendications précédentes, comprenant les étapes consistant à :
    - mettre à disposition un boîtier (2) du générateur de gaz (1), et
    - disposer un filtre (3) pour la filtration de gaz pouvant être générés avec le générateur de gaz (1) dans le boîtier (2) de telle manière qu'une partie (4) du générateur de gaz (1) est introduite dans un évidement (30) du filtre (3) afin de fixer le filtre (3) dans le boîtier (2), la partie (4) du générateur de gaz (1) étant introduite pour la fixation du filtre (3) dans le boîtier (2) le long d'une direction d'extension (E) du boîtier (2) dans cet évidement (30) de sorte que le filtre (3) s'élargisse transversalement à cette direction d'extension (E) et appuie contre une face intérieur (21) du boîtier (2) orientée vers le filtre (3).
  15. Procédé selon la revendication 14, caractérisé en ce qu'un papillon (5) est disposé dans le boîtier (2) de telle manière que la partie (4) en forme d'axe s'étendant le long de la direction d'extension (E) s'étende depuis le papillon (5) le long de la direction d'extension (E).
EP09744985A 2008-10-08 2009-10-02 Générateur de gaz pour un module de coussin gonflable Not-in-force EP2337710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008050763A DE102008050763A1 (de) 2008-10-08 2008-10-08 Gasgenerator für ein Airbagmodul
PCT/EP2009/062830 WO2010040691A1 (fr) 2008-10-08 2009-10-02 Générateur de gaz pour un module de coussin gonflable

Publications (2)

Publication Number Publication Date
EP2337710A1 EP2337710A1 (fr) 2011-06-29
EP2337710B1 true EP2337710B1 (fr) 2012-08-01

Family

ID=41401932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744985A Not-in-force EP2337710B1 (fr) 2008-10-08 2009-10-02 Générateur de gaz pour un module de coussin gonflable

Country Status (6)

Country Link
US (1) US8167334B2 (fr)
EP (1) EP2337710B1 (fr)
JP (1) JP5518876B2 (fr)
CN (1) CN102123889B (fr)
DE (1) DE102008050763A1 (fr)
WO (1) WO2010040691A1 (fr)

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US8979121B2 (en) * 2011-03-18 2015-03-17 Autoliv Asp, Inc. Pyrotechnic inflator with central diffuser and composite overwrap
JP5985950B2 (ja) * 2012-10-04 2016-09-06 株式会社ダイセル ガス発生器とその組立方法
US8702125B1 (en) * 2013-01-18 2014-04-22 Autoliv Asp, Inc. Multi-strainer emission treatment for inflatable restraint system inflators
JP6504963B2 (ja) * 2015-08-05 2019-04-24 株式会社ダイセル 筒状ハウジング開口部の閉塞構造とガス発生器
JP6691442B2 (ja) * 2016-06-27 2020-04-28 株式会社ダイセル ガス発生器
CN108146383B (zh) * 2017-12-21 2020-02-07 湖北航天化学技术研究所 一种药片、气体发生器及气体发生设备
DE102018105445A1 (de) * 2018-03-09 2019-09-12 Benteler Steel/Tube Gmbh Gehäuse eines Gasgeneratormoduls für ein Airbagsystem eines Kraftfahrzeuges
CN114030440A (zh) * 2021-12-02 2022-02-11 湖北航天化学技术研究所 一种气体发生器

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Also Published As

Publication number Publication date
DE102008050763A1 (de) 2010-04-29
US8167334B2 (en) 2012-05-01
JP5518876B2 (ja) 2014-06-11
JP2012505102A (ja) 2012-03-01
US20110148084A1 (en) 2011-06-23
WO2010040691A1 (fr) 2010-04-15
EP2337710A1 (fr) 2011-06-29
CN102123889B (zh) 2014-06-04
CN102123889A (zh) 2011-07-13

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